Demand for epidemic prevention and control: Under the background of COVID-19 epidemic, in order to reduce the risk of crowd gathering and contact spread, many restaurants require customers to scan the code to order food, thus avoiding direct contact between people. This article has passed, which may not be the main reason. The main reasons are as follows. Delivery Bao, Hungry, Meituan and these softwares all support the realization of functions. The main reasons are as follows.

Improve efficiency: using scanning code to order food allows customers to choose their own dishes, avoid queuing to order food, reduce the workload of waiters and improve the efficiency of the whole restaurant.

Fine management: By scanning the code to order food, the restaurant can manage the customer's order data more finely, understand the customer's consumption habits and preferences, optimize the menu and improve customer satisfaction.

Cost saving: Using scanning code to order food can reduce the labor cost of the restaurant, because there is no need to hire too many waiters to order food and serve.

To sum up, the restaurant requires customers to scan the code to order food in order to meet the needs of epidemic prevention and control, improve efficiency, fine management and save costs, thus improving the operational efficiency of the whole restaurant.